Traditional college sports aren’t for everybody. Although joining the football, basketball, or rowing club remains be the be-all and end-all of school life for many students, the extreme competitiveness of university athletics can easily sap the fun factor from these physical activities, excluding a large group of active youngsters who just want a bit of fun. So what are the options for those who enjoy physical activities but don’t fancy the hard graft of competitive sports? Ultimate frisbee has gained a lot of traction in the last few decades, but there’s now an even weirder craze sweeping campuses across the US: Humans vs. Zombies.

Humans vs. Zombies (HvZ) is a live-action game in which a team of Humans tries to survive a “Zombie invasion”. The game ends when all Humans have been turned into Zombies, or if the Humans survive for a certain period of time. Humans, being highly vulnerable to Zombies, can defend themselves with certain moderator-approved items such as marshmallows, socks, and—obviously—foam dart guns. There is clearly a lot of potential for fun in the game itself, but the introduction of weapons and equipment has allowed players to make their own creative props—sometimes with a 3D printer!

Jeremy Chang, creator of this cool 3D printed weapon, is one such player. A keen HvZ player, Chang had already modified a number of Nerf guns before embarking on his latest ambitious project: Building a Halo 5 assault rifle, complete with 3D printed parts. The replica MA5D, made from a Nerf Rayven blaster, boasts a number of impressive visual and technical features, such as a digital ammo counter and functional scope. Based on the fictional United Nations Space Command weapon, the 3D printed replica looks set to obliterate many a zombie. After five years of tinkering, we sure hope it’s ready for action.

The 3D printed foam dart gun is a Nerf Rayven at its core, but with several important modifications. To achieve the iconic shape of the MA5D, Chang added several 3D printed exterior parts, all printed on a Rostock Max V2 3D printer and smoothed with XTC-3D coating. The shape of the 3D printed weapon is, of course, only the beginning: Its incredible working ammo counter uses an Adafruit 128×64 pixel OLED Screen lit with a NeoPixel RGB LED, with the screen also functioning as a mission timer—presumably so that Chang and his team of Humans can know when they’re safe from the invasion. The 5V scope of the gun adds a touch of class to the functional prop, whose complex wiring and programming make it a stunning feat of DIY making.

Chang is planning to sell kits of the 3D printed front end parts, which will fit onto any Nerf Retaliator/Recon barrel.